I am working on a Whpl fridge. model# GC5SHAXVY00 - it is a side by side unit. It has power, all lights and front panel by the dispenser is working, but the compressor does not start. It has a circuit board on the compressor - it is getting power, but nothing is happening. Where to start?

New Inverter and old inverter - no change in the fridge. I tested the DC values from the control board and they appear to be good. The fridge is only 2 years old per the home owner and they purchased from a local proprietor. She is going to them to replace.